Linux-PAM pam_userdb Observable Timing Discrepancy in Plaintext Password Comparison (Linux-PAM Linux-PAM)

CVE-2026-54411
MEDIUM 6.9

En bref

Source
NVD
EPSS
EPSS 0.32 % · centile 25 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
TuranSec
Statut NVD
Deferred

Description

Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module's plaintext-password comparison path in modules/pam_userdb/pam_userdb.c that allows a local or network-adjacent attacker able to repeatedly drive authentication through a calling service to recover the plaintext password of a target account by measuring response-timing differences.

Faiblesses (CWE)

  • CWE-208 — Écart de temps observable

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 4.0MEDIUM 6.9CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/AU:N/V:DTuranSec
CVSS 3.1MEDIUM 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NTuranSec
CVSS 4.0MEDIUM 6.9CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:X/V:D/RE:X/U:XNVD · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (Secondary)
CVSS 3.1MEDIUM 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NNVD · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (Secondary)

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
Linux-PAM · Linux-PAMaffected 0 ≤ 1.7.2

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD